Motor.



No. 740.117. PATENTED SEPT. 29, 1903.

G. B. PRALEY.

MOTOR.

APPLICATION FILED JULY 14, 1902.

N0 MODEL. 2 SHEETSSHEET 1 war/ m: Noam: PETERS cov wmo-u'mq. wAsHmsToN, n c

2 SHEBTSSHEET 2 PATENTED SEPT. 29, 1963.

G. B. FRALBY.

MOTOR.

APPLICATION FILED JULY 14. 1902.

7 UNITE I STATES 'iatented September 29, 1903.

PATENT O EIcE.

' GEORGE B. FRALEY, OBI-PHILADELPHIA,

PENNsYLVANIA, AssIeNoR To ELIZABETH s. GALBRAITH, E PHILADELPHIA, PENNSYLVANIA.

srncxncarron forming part of Letters Patent Ne. 74o,117,

dated September 29, 1 903.

Application filed July 14,190 Serial No. 115,409. (No model.)

. boxes or packing to confine the gas.

My invention also consists of a novel 'arran gement of valves and valve-gear and, further, in various novel features of construction hereinafter fully described and claimed.

Figure 1 represents a partial side elevation and vertical section of a motor constructed in accordance with myinvention. Fig. 2 represents a plan of a portion of the valve-operating mechanism. Fig.3 represents a vertical section of the end of one of the cylinders. Fig. 4 represents a vertical section thereof, taken on the line a: w of Fig. 3. Fig. 5represents a perspective view of the cylinderhead, taken from the inner side. Fig. 6 represents a perspective view of an insulatingcup that is situated within the cylinder-head. Fig. 7 represents a plan view of the valvegear and valve. Fig.8 represents a side elevation of-the valve-gear. Fig 9 represents a-horizontal section of the valve, taken on the line y y 'of Fig.13. Fig. 10 represents a similar view, but with the valve in a difierent position. Fig. 11 represents a horizontal section of the valve, taken on the line a z of Fig. 14. Fig. 12 represents asimilar view, but with the valve in a different position. Fig. 13 represents a fragmentary'section of the valve, taken on the line m ac of Figs.7 and 9. Fig. 14 represents a vertical section taken onthe line y y of Figs. 7 and 11. Fig.

15 representsja perspective view of the valve, taken from its lower side. Fig. 16 represents a side elevation thereof.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings, 1 designates a reservoir or tank communicating with a suitable source of supply by means of a pipe 2 and with the pumps 3 and 4 by'means of the pipes 5. These pumps 3 and et are provided with the usual suction and'discharge chambersand with a passage 6, leading to the cylinder 7, and also with a discharge-pipe 8.

Within the cylinder 7 are "the pistons 9, that are caused to move in unison by the common piston-rod 10, which passes through the ends of the cylinder in which the water is drawn in and discharged. In the other ends of the cylinder and on the other sides.

of the piston the propelling medium is admitted, and I will now proceed to describe the construction by which I avoid the employment of a stulfing box or boxesand packing to confine this propelling medium, since I find that owing to its nature'gasified liquefied gases are not controlled and confined by ordinary stufing-boxes and packings to the degree necessary in this connection. The

outer head 11 of the cylinder is provided with an inlet and exhaust port 12, that communicates with the valve-casing 13, said valvecasing being provided with an exhaust-port 14 diametrically opposite, and the upper end of the valve-casing communicates with the pipes 15, saidv pipes 15 at each end of the roller communicating with a common pipe 16, leading to a source supplying a liquefied gas,

the state of which has been changed to a gas.

- The valve 17, Figs. 15 and 16, is cylindrical and is carried by arotatable stem 18, passing through the bottom of the casing 13 and connected with suitable mechanism for partially rotating or oscillating the same, hereinafter described. The valve 17 rests onthe bottom of the valve-casing, the adjacent faces .of

the's'ej partsbeing suitably finished to form a I tight joint that will prevent the passage of the gas. To maintain the valve'always upon its seat,the connection between the same and the stem 18 is not rigid, the same being secured by forming notches 19 in a screw threaded boss 20 on the upper side of the valve, in which is situated a pin 21, carried by the upper end of the stem, which permits the relative movement between the stem and valve, although causing said parts to rotate in unison. A cap 23 screws over the boss 20 and a tight joint is made by a packing-ring 24 between the cap and the valve. The valve cam-faces 45.

17 is provided with two ports, one, the port 25, that controls the inlet to the cylinder and which consists of an opening between the upper and lower sides of the valve, and the other port, 26, consists of a channel or the inner side of the valve of sufficient length to join the ports 12 and 14 of the valve-casing.

In the outer head of the cylinder is a recess 27, in which I place the insulating-cup 28. The head 11 and the cup 28 are provided with the openings 29 and 30, which I have shown as threein number, one communicating with the combined inlet and exhaust port 12, while the other two receive suitable insulated terminal-plugs 31 of an electric circuit, which are connected with an electric heater 32, lying within the cup 28. In controlling the inlet and exhaust of this propelling medium I find it desirable to operate the valves instantaneously to uickly open or close the inlet or exhaust, an I have shown one form of mechanism for accomplishing this purpose in a practical way, and I will now describe it.

The valve-stems 18 are provided with the arms 33, that are pivotally connected with the vibratory rod 34, so that when this rod 34 is moved back and forth the valves 17 are oscillated, the extent of movement of the rod and the means for moving it being such that the limit of the movement of said rod will alternately bring the valve-port in communication with the port 12 and the port 26 in communication with the ports 12 and 14, thus alternately opening the inlet and the exhaust from the cylinder. Conveniently mounted upon the top plate 35 of the reservoir 1 is a post 36, carrying the plate 37, to which is pivoted at 38 the vibratory member 39, one end of which is conveniently slotted, as at 40. One end of the bell-crank lever 41, mounted on the pivot 42, has a pin situated within the slot 40, and the other arm of said bell-crank lever is pivoted to a block 43, rigid with the rod 34. The said vibratory member 39 is pivoted near one edge to the plate and at equal distances on either side of thepivot is provided with the stops 44. The adjacent edge of the plate 37 is angular, the apex being midway between the stops 44 or opposite the pivot 38 to form the Mounted at the other side of the plate 37 and also in alinement with the apex of the cam-faces 45 and the pivot 38 is the lever 46. The said lever is slotted, as at 47, to receive the pivot-pin 48, upon which it vibrates. On theunder side of the lever is a projection 49, conveniently an autifrictionroller, and which is long enough to extend across the edges of the plate 37, as well as the vibratory member 39, the location of the same with relation to the slot 47 and pivot 48 being such that when said lever is at one limit of its throw and in engagement with 5 changed to a gas, I prefer to employ heat to raise the temperature thereof and to increase 1 the degree of expansion, and it is in this state that it enters the pipes 15 from the pipes 16;

one of the stops 44 of the vibratory member the pivot 48 is at the inner end of the slot 47, while when the projection 49 is at the apex of the cam-faces 45 the pivot-pin is at the other end of said slot. Suitably mounted with the swinging end of the lever 46 is a spring 50, the other end of which is connected to a stationary support, and the tendency of said spring is to hold the inner end of the slot 47 against the pin 48, or, in other words, to hold the projection 49 against thecamfaces 45. The free end of said lever 46 is situated in the path of two projections 51 and 52, carried by a longitudinally-movable rod 53, the ends of which pass into the ends of the cylinder and are situated to be moved by the pistons 9.

The operation is as follows: When the parts of the motor are in the position shown in Figs. 1, 2, 7, 8, 9, 11, 13, and 14, the left-hand cylinder is exhausting and gas is being supplied to the right-hand cylinder. As the pistons movein the direction shown by the arrow the piston of the right-hand cylinder will contact with the end of the rod 53, and thereby move the projection 52, and the lever 46 will be moved in the direction shown by the arrows in Figs. 2 and 7 against'the tension of the spring 50. As the lever 46 is thus moved the projection 49 rides over the right-hand camface, also against the tension of the spring 50, and as soon as the projection 52 reaches the point shown in dotted lines in Fig. 7, which is about the endof its stroke in this direction, the projection reaches the apex of the cam-faces, and as soon as it passes the same the tension of the spring will draw it instantly along the left-hand cam-face, causing it to contact with the edge of the vibratory member 39 and to turn this member on its pivot, the contact between said projection 49 and the left-hand stop 44 bringing the parts to a standstill; but when the vibratory member 39 is vibrated it swings-the bell-crank lever 41, which moves the rod 34 laterally and turns the arm 33 to such auextent that it will bring the ends of the valve-port 26 opposite the ports 12 and 14 of the valve-casing. This then reverses the position of, the valves, throwing the left-hand valve from the position shown in Figs. 7, 9, and 13 to the position shown in Fig. 10, while the righthand valve,- as shown by Figs. 7, 11, and 14, is thrown to the position shown in Fig. 12, which causes the right-hand cylinder to exhaust and permits the propelling, medium to enter the left-hand cylinder. When the piston in 3 the left-hand cylinder contacts with the end of the rod 53, it will cause the projection 51 to move the lever 46 in the opposite direction, j and when it reaches the apex of the cam-faces it will again be quickly operated by the spring 50 and throw the vibratory member 39 again to the position shown in full lines in Fig. 7, thus restoring the valves to the other position.

When the state of the liquefied gas is but to obtain the greatest expansive force from this gas I propose to further superheat the same, and I have shown one way in which this can be conveniently accomplished namely, by an electric heater placed in the head of the cylinder and by means of which I am enabled to obtain an exceedingly high degree of temperature, which'notonly in-- creases the expansive force,and consequently the power to be derived from the motor, but also obviates freezin.g,which has been found to be a great objection to motors employing a propelling medium of this class.

Although in the drawings I have-shown the valve-gear arranged to make a full stroke, it will be understood that the gearing maybe changed tolcut ofi the propelling medium at any desired part of the stroke.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a motor having a cylinder, a valve controlling the passage of the propelling medium thereto,'and consisting of a valve-seat and a disk valve and a rotary stem connected with said disk valve to rotate the same, the connection between said stem andvalve permitting the movement of the valve longitudinally of its stem.

2. In a motor having a cylinder, a valve controlling passage of the propelling-medium,- and consisting of a valve-seat and disk valve, a rotary stem connected with said disk valve to rotate the same, the connection between, said stem and valve permitting the movement of the latter longitudinally of its stem, and

means for sealing the upper side of said valve.

3. In a motor having a cylinder, a valve controlling the passage of the propelling me-- dium thereto, and consisting of a valve-seat and'a disk valve,- an opening through said valve and valve-seat, a rotary stem passing through said openingsand connected with said valve to rotate the same, the connection between said stem and valve permitting the movement of the latter longitudinally of said stem, and a sealing-cap situated upon the outside of said valve and sealing the opening therethrough.

4. In a motor having a cylinder, a valve controlling the passage of the propelling medium thereto, and consisting of a valve-seat having an opening therethrough, a disk valve having a boss on its outside provided with an opening, a rotary stem passing through said openings, and having projections loosely engaging said valve, and a sealing-cap mounted upon said boss and sealing the opening through said boss.

5. The combination with the valves of a cam, said lever being movable uponits pivot by reason of the movement of the motor-pistons, a vibratory member situated adjacent said cam and in the path of said lever and provided with stops adapted to be engaged by, .said lever, said vibratory member being connected with said'connection' between the valves.

' GEORGE E. FRALEY.

Witnesses:

JOHN A. WIEDERSHEIM, E. HAYWARD FAIRBANKS. 

